idk3
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# What are some examples of parabolas?

a) $f(x) = 2x^{2}+4\cdot x +\sqrt{2}$ b) $f(x) = x^{2}$ c) $f(x) = -5\cdot x^{2} + 4$ d) $f(x) = -12\cdot x^{2} -5\cdot x$